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package com.oracle.truffle.llvm.tests.interop;

import org.graalvm.polyglot.Value;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;

import com.oracle.truffle.api.interop.InteropLibrary;
import com.oracle.truffle.api.interop.TruffleObject;
import com.oracle.truffle.api.library.ExportLibrary;
import com.oracle.truffle.api.library.ExportMessage;
import com.oracle.truffle.llvm.tests.Platform;
import com.oracle.truffle.tck.TruffleRunner;

@RunWith(TruffleRunner.class)
public class VaListTest extends InteropTestBase {

    static Value testVaListCallback3;
    static Value getNextVaarg;

    @ExportLibrary(InteropLibrary.class)
    static class VaListCallback implements TruffleObject {

        @ExportMessage
        boolean isExecutable() {
            return true;
        }

        @ExportMessage
        Object execute(Object... arguments) {
            Object vaList = arguments[0];
            Value res0 = getNextVaarg.execute(vaList);
            Value res1 = getNextVaarg.execute(vaList);
            Value res2 = getNextVaarg.execute(vaList);
            return res0.asInt() + res1.asInt() + res2.asInt();
        }
    }

    @BeforeClass
    public static void loadLibrary() {
        Value testLibrary = loadTestBitcodeValue("valist.c");
        testVaListCallback3 = testLibrary.getMember("test_va_list_callback3");
        getNextVaarg = testLibrary.getMember("get_next_vaarg");
    }

    @Test
    public void testVaListCallback() {
        if (Platform.isAArch64()) {
            // TODO: enable when the managed va_list for AArch64 implemented
            return;
        }

        Value res = testVaListCallback3.execute(new VaListCallback(), 1, 2, 3);
        Assert.assertEquals(6, res.asInt());
    }

}
